Drilling implement



June 29, 1943. w. GERSTENKORN DRILLING IMPLEMENT Filed Sept 25, 1941 2 Sheets-Sheet l 2 Jnranfar: WILHELM GERSTENKORN y 2% u r w June 29, 1943.

w. GERSTENKORN DRILLING IMPLEMENT Filed Sept. 25, 1941 2 Sheets-Sheet 2 b L L L a I :"HHHJ I Jnren/or: WILH ELM GERSTENKORN is rigidly connected by means -or a bearing-star; for instance, by the interme Patented June 29,- 1-943 DRILLING IMPLEMENT I Wilhelm Gerstenkorn, Essen, Germany; vested in the Alien Property Application September 25, 1941, Serial No.

Custodian In Germany February 29, 1940 2 Claims. (01. 255-73) The invention relates to especially suited for deep boring.

The object of the present invention is to provide a drilling implement, especially a drilling he drill is introduced into the earth always vertically and in a straight line, also if the depth is to be comparatively great.

A constructional form of the invention is illustrated by way of example on the accompanying drawings.

Fig. 1 shows a vertical through a drill head a bore hole.

Fig. 2 shows the same in sectional view, the directive body and thedrill head being, however, in another position with respect to one another.

Fig. 3 is a plan thedirective body.

Fig. 4 is a plan view of an adjusting member.

Fig. 5 is a plan view of a part of the clutch between the drill rod and the directive body.

longitudinal section with its directive body within Fig. 6 is'a side-view of the lower part of the directive body. p H

Fig. 7 is a bottom view of the directive'body. Fig. 8 shows another embodiment in a vertical longitudinal section.

Fig, 9 shows a like sectional view, but in another position of the directive body and the drilling head with respect to one another.

Fig. 10 shows, drawn on a larger scale, a part sectional view illustratinghow the toolis supported in the directive body,

Fig. 11 'showsa section in the line |Ill oi Fig; 10.

I denotes the bore hole in which a drill 3 is arranged in the usual manner at a drillhead 4 (socket) by means of a drill rodding 2. In the constructional form shown the drill has the shape of a known fish-tail drill. The drill spindle 2 is hollow for supplying a scavenging liquid under pressure. This liquid escapes from the apertures 'of the drill 3. At the upper end of the drill spindle is provided in the usual manner a threaded connecting piece 5 for attaching further spindle parts or drill rods if deep bore holes are to be drilled. On the drill spindle is, furthermore, a bearing body, for instance an adjusting socket 6, which can be adjusted on the drill spindle and secured in its position by screws 1. This adjusting ring 6 is conical at the frontal surface 8',

view of the guide member for a drilling implement,

-implement for deep boring, which warrants that 5 portions and the.

and this surface contacts with a corresponding conical frontal surface 9 of a guide box Ill surrounding the drill spindle. This guide box Ill of bearing arms ll member, for instance an adjusting ring l4, ad-

justably fixed by means of screws l5, and this adjusting ring bears at its lower side a clutch member designed, in the constructional form shown, as a toothed surface It. At the lower end of the directive body is another guide box II for the drill rod 2. and this guide box'is likewise connected with the directive shell I3 by means of bearing arms or a bearing star i6, preferably by the intermediary of a insertion ring H. The hearing or guide box I1 is at its upper side provided with a clutch member 20 designed in the constructional form shown, as a toothed coupling member and able'to co-operate with the toothing it of the adjusting part II.

The directive shell 12, the diameter of which is preferably a little smaller than the diameter of the drill, consists of a cylindrical tubular body arranged behind the drill head proper and provided at suitable places with a plurality of apertures 2| aiiording access to the drill spindle. The directive shell II is conically tapered at its upper end,'as indicated at 22, and is there provided with a plurality of apertures (not shown). The lower frontal side of the directive shell I3 is designed as a drilling or milling tool and is provided for this purpose with a milling cutter 23 which can be exchangeably connected with the directive shell l3.

The drilling implementdesigned according to this invention can advantageously be employed also for ram boring.

The clutch members the construction form illustrated, viz. the adjusting ring and the boxes I and I1, designed without the toothed coupling parts It and 20 may be designed as simple friction disks or as ramming surfaces so that when the drill is driven forwardly and if projecting rock parts or untrue like in the bore hole appear when the movement of the directive shell remains back after the forward movement of the drill head, the directive shell will be taken along in a jerky manner over the ramming or friction faces. It is, with this directive body cutter shoe.

The device according as follows: The drilling implement is inserted into a shalt as usually provided for in the case of deep drilling, and secured in place therein by crossed members. Thereafter the drill spindle 2 is turned by known means and the drilling operation commences in the desired direction vertically or obused in connection with constructional form, suited to the tothe invention operates drill spindle and the directive body have been worked down into the bore hole for a certain length and the directive body has become disconnected from the crossed pieces it follows the drill sliding under its natural weight, disconnects the clutch connection and remains hanging with its upper bearing member ID upon the bearing body 6 of the drill spindle 2.

Now the directive shell bears with its bearing members l0, II, I 2 and by the intermediary of the conical surface 9 upon the conical surface 8 of the adjusting ring and is moved downwardly together with the drill head, there being, how- 'ever, no transmission of the rotary motion from noted 24 in the Figs. 1 and 2. When the dl'lll spindle 2 now continues to get down together with the drill a relative movement takes place between v the now stationary directive shell [3 andthe drill spindle 2 in the direction of the longitudinal. axis of these members. Simultaneously with this movement the clutch part l4, l5, l6 approaches .upon the drill spindle 2 the other clutch part ll-Zll of the directive body and after a sufllcient downward movement of the drill spindle 2 the two clutch parts It and 2'0 are coupled with one another. This position is shown in Fig. 2. The connection between the drill spindle and the directive body can also take place when the drill 3 has bored the bore hole not accurately circular.

From this moment, the drill spindle continuing to rotate the directive shell I3 is rotated with it and the tool 23 removes the piece 24 projecting into the bore hole, or corrects the untrue portion of the same. As soon as this unevenness has been done away, the directive shell can freely slide down by reason of its natural weight, whereby the coupling between the parts l6 and 20 will be automatically interrupted and the directive shell or directive body follows the drill, its bearing guiding member contacting again with the bearing member 6 of the drill spindle2. -Thedirective shell prevents; therefore, the bore from being deflected by the above mentioned obstacle 24 and the-vertical or straight-lined direction is re-established.

This procedure will be repeated as often as untrue portions tending to deflectthe drill spindle from the straight direction will arise.

When the drill must be exchanged or re-ground, generally the entire rodding is raised together withthe directive shell, in which case this shell smoothes the wall of the drill hole.

In th embodiment shown'in Figs. 8-11 the parts with the letter references I to 25 correspond to the parts of the embodiment shown in Figs. 1-7.

In the embodiment of Figs. 8-11 the directive body consists of two parts, viz. a longer upper part 26 and a shorter lower part 21 which both have the same diameter. Into the upper end of the lower part 21 is inserted a sleeve or the like 28 which is rigidly connected with the part 21 by means of rivets 29. This sleeve extends partly into the lower end of the directive shell 26 'and is provided on its outer circumferential surface witha plurality of annular recesses 30 serving for the reception of bearing rings or guide rings 3|, preferably divided ones. The rings 3| are held-at the inner side of the upper part 26 of the directive body for instance by screws 32. There is obtained in this way a bearing similar to a collar bearing. It is from reasons of stability suitable to provide thick portions 33 withinthe sleeve 28 at those parts where the recesses for the bearing rings are tobe produced.

Also in this embodiment the directive shell is preferably narrowed at its upper end'in order to prevent that it jams at the wall of the bore hole when being withdrawn therefrom. Instead of the bearing arrangements shown or in connection therewith any suitable packings of leather, rubber or stuillng box packings may be provided.

The device operates similarly as described in connection with the example of Figs. 1-7 with the difference that when the drilling spindle and the directive body are coupled only the lower part 21 with the auxiliary drilling tool 23 is rotated while the upper part 25 of the directive body remains stationary. This position is shown in Fig. 9

With a drilling implement designed according to this embodiment only the small additional energy for rotating the auxiliary drilling tool has to be supplied from the drive. If the bearing between the two parts of the directive body must again be lubricated it is only necessary to remove the fastening means 32 for the divided rings 3! of the collar bearing and to press the Staufier lubricating grease or the like thereinto.

The directive body of the invention may be built up by a plurality of commercial steel tubes. If with very deep bore holes the employment of only one directive body consisting of only one tubular piece or composed of a plurality of such pieces should-beinsuflicient, several such bodies or tubings suitably spaced may be added. The added directive bodies need not, of course, a clutch connection with thedriving member of the drilling implement.

Corresponding with the weight and the desired size of the directive shell a plurality of adjustable supports 'f'or'the directive shell can be provided when practising the invention. There exists also the possibility to provide a plurality of clutchesif necessary-.between the drill rod and the directive shell.

I claim:

1. In a well drilling device having a rotatable fixed upon said shank.

2. A well drilling device according to claim 1, having the sleeve spaced a distance outside the shank so as to provide a passage for borings to be passed through thesame about said shank, the latter being rotatively dissociated from said sleeve except through said clutch and 'a bearing for said sleeve on said shank.

WILHELM GERSTENKORN. 

